*{
    margin: 0;
    padding: 0;
}
.bt{
    background-color: #2e8931;
    width: 100%;
    height: 200px;
}
.js{
    font-family: Arial,sans-serif;
    font-size: 50px;
    text-align: center;
    height: 100px;
    line-height: 100px;
    color: aliceblue;
}
.qk1{
    position: relative;
    left: 45%;
    width: 200px;
}
.js1{
    font-family: Arial,sans-serif;
    font-size: 25px;
    float: left;
}
.js2{
    font-family: Arial,sans-serif;
    font-size: 25px;
}